Multiresolution analysis of substructure in dark matter halos

被引：4
|
作者：
Seymour, MD [1 ]
Widrow, LM [1 ]
机构：
[1] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada
来源：
ASTROPHYSICAL JOURNAL | 2002年 / 578卷 / 02期
关键词：
cosmology : miscellaneous; dark matter; galaxies : halos; methods : n-body simulations;
D O I：
10.1086/342645
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Multiresolution analysis is applied to the problem of halo identification in cosmological N-body simulations. The procedure makes use of a discrete wavelet transform known as the algorithme a trous and segmentation analysis. It has the ability to find subhalos in the dense regions of a parent halo and can discern the multiple levels of substructure expected in the hierarchical clustering scenario. As an illustration, a 500,000 particle dark matter halo is analyzed and over 600 subhalos are found. Statistical properties of the subhalo population are discussed.
引用
收藏
页码：689 / 701
页数：13
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